The inquiry from the Police comes after the death of a man in Parkhead, Glasgow, on Sunday, March, 7 this year.
At around 11.15 pm on Sunday, the body of a 45-year-old man was found within a flat in Burgher Street, Parkhead.
A post mortem has now been carried out and his death is being treated as murder, police have announced.
The deceased has been named as 45-year-old Valerijs Litvins by Police Scotland.
His family has been made aware.
Police Scotland has said the incident is not assessed to be football- related.
Detective Chief Inspector Gillian Grant of Police Scotland's Major Investigation Team, said: "Officers have been in the area carrying out enquiries, checking CCTV and speaking to local residents in an effort to establish the circumstances surrounding his death, however, we are still keen to hear from anyone who may have information that would assist our investigation.
"We would be interested to hear from anyone who may have dash-cam footage from the street, or anyone who may have heard a disturbance in the area that night to contact us.
"Any details can be passed to police at the incident room on 0141 305 4530, quoting incident number 4216 of Sunday, 7 March, 2017. Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.”
Detectives have also set up an online portal to encourage members of the public to submit information.
This can be accessed by clicking here.